Socialism

Greenland is full of resources that corporations want, tariffs are a weapon against countries that do the bare minimum to resist complete dominion by US corporations. If the Venezuelan government and people had folded you'd see US corporations rebuilding infrastructure for extraction already, but it's just a bad investment right now as most Venezuelans have a terrible (and justified) view of the US.

I'm not saying the Trump administration shows careful planning, they definitely got lazier, but it's still capitalist logic, it's exactly how capitalists have treated foreign markets for centuries, they're just turning the violence of the empire inwards.